Albert King and Stevie Ray Vaughan frequently used a call-and-response technique over the first two bars of a 12-bar solo. They'd start with a "call" lick on bar #1, followed by a bit of silence as the chord progression moves to the IV chord at bar #2. Then they'd play a "response" lick, like this one, in the middle of bar #2, ending back on the I chord in bar #3. For this lick, you'll be applying vibrato on the very last bent note, which will not make your fingertips happy.